Electromagnetic separator.



.No. 851.9791 H I AT'ENTED APR. so, 1907. w. BLACKMORB.

ELECTROMAGNETIC SEPARATOR.

nrucuron FILED SEPT. 19, 1904.

2 SHEETS-SHEET 1.

m: mamas PETERS cm, wAsnmcwu. n. c.

PATENTED APR. 30, 1907.

W. BLACKMORE. ELECTROMAGNETIC SEPARATOR.

APPL'ICATION FILED SEPT. 19, 1504.

Z SHEETS-SHEET 2.

' the electro-magnets and in details UNITED STATES PATENT orunon.

ELECTROMAGNETIC SEPARATOR.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed September 19, 1904:. Serial. No. 225.107.

T aZZ'w/ wm it may concern:

Be it known that I, WILLIAM BLAOKMORE, a subject of the King of GreatBritain and Ireland, residing at Bishopsgate Street Within, London, E.(1, England, have invented Improvements in Electromagnetic Separators,of which the following is a specification.

This invention relates to the separation of ores of more or lessmagnetic permeability by passing such ores crushed and in a wet statethrough a strong magnetic field.

The invention consists in distributing the ore from distributing boxeson to a revolving conical table whose rim passes between opposing polepieces of an electroma-gnet, in such a manner that magnetic particles ofore are retarded between the point of feed and the edge of the table,and are so separated from non-magnetic particles.

The invention also consists in the form of of the apparatus employed.

Referring to the accompanying drawings Figure 1 is an elevation partlyin section of my apparatussuitable for treating ore in a wet state. Fig.2 being a plan of the same, with part of the revolving table cut away;Fig. 3 is a plan of an alternative form of dis tributing box while Fig.4 is asectional view of the same.

The conical table, a, of non-magnetic material is carried by a wheel,I), mounted on a vertical shaft, -c, rotating in' bearings, (Z, in theframe, e, of the machine, the shai t, c, being rotated by a drivingpulley, f, or any other convenient means. The distributing boxes, g, aresupported on cross pieces, h, fixed to the frame of the machine. The oreto be treated is fed by any suitable wet ore pulp feeder into thesedistributing boxes and washed on to the revolving table by a stream ofwater supplied to the boxes in any convenientmanner. ater pipes, 2',supported in the main frame of the machine, are provided at the side ofeach box toward which the revolving table moves. The pipes, 11, areprovided with jets, which assist the washing away of the ore which hasbeen carried by the revolving table out of the stream from thedistributing boxes, and give the magnetic products a final washing tofree it from any adhering non-magnetic particles.

Electromagnets, Z, are fixed by bolts to the frame of the machine,-beingplaced at intervals slightly in advance of the distributing boxes withtheir poles one on each side of the conical table, a, preferably nearthe edge. The edges of the pole pieces of each magnet are concentricwith the edge of the revolving table. The pole piece, m, below the tableis convex in shape and is preferably provided with a projection, n, inthe direction in which the table moves, and may be tapered as shown inFig. 1. This projection is not absolutely essential but is a convenientarrangement for collecting the magnetic material on the cover at a pointbeyond the area of feed so that it can be easily sprayed oil by thewater jets. The pole piece, 0, above the table may be tapered at itsend, p as shown in Fig. 1, and rounded ofi as s own in Fig. 2, and mayif desired be formed separate from the body of the magnet, beingattached thereto by a bolt, 1-, passing through a slot in the polepiece, thus allowing an adjustment of the distance between the polepieces by meansof the screw piece, 8. It is obvious that in thisconstruction of electromagnet the pole piece is adjustable also in anhorizontal direction by the bolt 1'. To preserve continuity of themagnetic circuit iron or steel washers or distance pieces (not shown)would of course be inserted between Z and m. Collecting boxes may beplaced below the edge of the conical table, a, in suitable positions.

Figs. 3 and 4 show an alternative form of distributing box; in this boxwater and ore are supplied through the pipe, 25, in the form of orepulp, between the projections, u, in the fan shaped mouth, 1: of thebox.

In the apparatus above described which is suitable for treating ore in awet state the angle of inclination of the surface of the conical tableshould be sufficiently great to prevent ore settling on the table, sayabout The operation of the machine is as follows The wet ore pulp fromeach distributing box is washed down the surface of the conical table ina stream which passes between the poles of the corresponding magnet. Themagnetic particles are retarded in their passage down the table by theaction of the magnetic field and are carried on by the table farther inthe direction of rotation than the non-magnetic particles, and so arewashed into collecting boxes A placed in advance of those, designated B,which collect non-magnetic pa ticles.

In these machines there is no distinct line vide a greater or lessnumberif desired.

of demarcation at which theseparation of the magnetic from thenon-magnetic particles of ore ceases and I have found it advisable toplace a third collecting box C between the two which collect magneticand non-magnetic particles; the ore-falling into this additicnalcollecting box is-partly magnetic and partly non-magnetic and may bepassed a Second time through the machine.

In the apparatus illustrated I have shown four magnets and thecorresponding distributing and collecting boxes; but I may pro-I-lavingncw described my invention, what I claim as new and desire tosecure by Letters Patent is 1. A magnetic ore wet separator, comprisingin combination, a revolving conical table, a plurality of separateelectromagnets disposed at intervals around said table, windings on theelectromagnets, electromagnet pole pieces on each side of said table,the upper pole pieces of said magnets being removable withoutmoving thewinding's, distributing boxes for distributing ore on to said table, andwater jets for distributing water on to said table, as set forth.

2. A magnetic ore wetseparator, comprising in cc mbinaticn, a revolvingconical table, a plurality of separate eleotromagnets disposed atintervals around said table, electromagnet pole pieces on each side ofsaid table, the lower pole pieces being fixed to the frame of themachine, the upper pole pieces being adjustable in a vertical direction,means securing said upper pole pieces to said lomer pole pieces, theupper pole pieces of said magnets being removable without moving thewindings thereof, distributing boxes for distributing ore on to saidtable, and Water jets for distributing water on to said table, as setforth.

3. A magnetic ore wet separator comprising in combination, a revolvingconical table, a plurality of separate electromagnets disposed atintervals around said table, electromagnet pole pieces on each side ofsaid table, the lower pole pieces being fixed to the frame of themachine, said lower pole pieces only having windings thereon, upper polepieces having slots therethrough, screw means engaging said lower' polepieces, the

diameter of said slots being greater than tide cl-iain'etebofisaidscrewmeans, the upper pole pieces being adjustablein' 'a 'vertical g g m-e.

direction and removable without moving the windings, distributing boxesfor distributing ore on to said distributing water on to said table, asset forth.

table, and water jets for 4. A magnetlo'ore wet separator comprising incombination, a revolving conical table,,a plurality of separateelectromagnets disposed at intervals around said table,

windings on the electromagnets, electromagnet pole pieces on eachside ofsaid table, the upper pole pieces of said magnets being removablewithout moving the windings, distributing boxes for distributing ore onto said table, said distributing boxes having fan shaped mouths withprojections in said mouths,

and water jets for distributing water on to said table, asset forth.

5. A magnetic ore wet separator comprising in combination, a revolvingconical table, a downwardly projecting rim to said table, collectingboxes arranged aboutsaid rim to collect the different qualities of theore, a plurality of separate electromagnets d sposed at intervals aroundsaid table, windings on the, electromagnets, electronliagnetpole' pieceson each side of said table, t

1e upper pole pieces of said magnets being removable without moving thewindings, distributing .boxesfor distributing ore on to said table, andwater jets for distributing water on to said table, as set forth.

6. A magnetic ore wet separator comprising in combination, a revolvingconical table,

a plurality of separate electromagnets disposed at ntervals around saidtable, windings on P the electromagnets, electromagnet ole pieces oneach side of said table, the upper movab tributing boxes for pole piecesof said magnets being ree without moving the windings,'di sdistributingore onto said table, and. water jets disposed tangentially at intervalsaround said table for distributing water on to said table, as set forth.

In testimony whereof I have signed my name to this specification in thetwo subscribmg witnesses.

presence of WILLIAM BLACKMORE. Witnesses ALBEizT E. PARKER. FRANCIS J.BIGNELL.

